LA MALBAIE, Quebec (AP) — President Donald Trump delivered a stern warning on trade to foreign countries at the Group of Seven summit on Saturday, advising trading partners not to retaliate against U.S. tariffs on the imports of steel and aluminum. “If they retaliate, they’re making a mistake,” Trump declared.

Trump told reporters he pressed for “fair and reciprocal” trade practices at the G-7 meeting in Canada, urging his foreign counterparts to eliminate all tariffs, trade barriers and subsidies in their trading practices. The president has been at odds with key allies over the new tariffs, which dominated his talks with the leaders of major industrialized nations in the Canadian resort town. In addition to the U.S. and Canada, the group includes Britain, Italy, France, Germany and Japan.

The president said the U.S. was “pretty close” to reaching an agreement on the North American Free Trade Agreement with Canada and Mexico and had discussed two types of sunset provisions in which any of the countries could leave the deal. Trump said the final outcome would lead either to a better agreement on NAFTA or separate trade deals with both Canada and Mexico.

Shortly before his arrival at the two-day summit, Trump injected additional controversy by suggesting that the G-7 offer a seat at the table to Russia, which was ousted from the group after it annexed Crimea in 2014. The president said Saturday that re-admitting Russia to the elite club would be “an asset,” telling reporters, “we’re looking for peace in the world.” Trump said he had not spoken with Russian President Vladimir Putin in a while.

Trump was departing the Canadian summit several hours early, heading to Singapore for his summit with North Korea’s Kim Jong Un on what he called a “mission of peace.”

Somalia’s Islamist group al Shabaab has claimed responsibility for an attack in which a U.S. commando was killed and four others were wounded when they came under fire in the country.

The U.S. special operations forces were fighting alongside about 800 troops from the Somali National Security Forces and Kenyan Defence Forces when they were attacked late on Friday by mortars and small arms fire.

“We attacked a military base … killed one U.S. soldier, two Kenyan soldiers and nine Somali soldiers from Jubbaland state. We also injured four U.S. soldiers,” Abdiasis Abu Musab, al Shabaabs military operations spokesman, told Reuters on late Friday.

He said the attack was in the southern town of Kismayo.

President Trump addressed the situation in a Saturday morning tweet, calling the U.S. soldiers heroes.

In a separate statement, the U.S. military said on Friday one local soldier was also wounded in the attack that also involved Somali and Kenyan forces.

The troops had been on a mission to clear al Shabaab from contested areas as well as villages the militants controlled, “and establish a permanent combat outpost” to expand the reach of the Somali state, according to the U.S. statement.

Kenyan military spokesman David Obonyo told Reuters that its forces were not involved in any operations in Somalia on Friday

About 500 U.S. troops are deployed in Somalia.

Al Shabaab is fighting to overthrow Somalia’s central government and establish its own rule based on its interpretation of Islamic law.